linux-kernel - [PATCH] iio: test : check null return of kunit_kmalloc in iio_rescale_test

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Message-Id: <ecd56a85e54a96c2f0313c114075a21a76071ea2.1730259869.git.xiaopei01@kylinos.cn>
Date: Wed, 30 Oct 2024 11:48:54 +0800
From: Pei Xiao <xiaopei01@...inos.cn>
To: liambeguin@...il.com
Cc: xiaopei01@...inos.cn,
	jic23@...nel.org,
	lars@...afoo.de,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	xiaopeitux@...mail.com
Subject: [PATCH] iio: test : check null return of kunit_kmalloc in iio_rescale_test_scale

kunit_kmalloc may fail, return value might be NULL and will cause
NULL pointer dereference.Add KUNIT_ASSERT_NOT_ERR_OR_NULL fix it.

Signed-off-by: Pei Xiao <xiaopei01@...inos.cn>
Fixes: 8e74a48d17d5 ("iio: test: add basic tests for the iio-rescale driver")
---
 drivers/iio/test/iio-test-rescale.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iio/test/iio-test-rescale.c b/drivers/iio/test/iio-test-rescale.c
index 31ee55a6faed..11bfff6636a3 100644
--- a/drivers/iio/test/iio-test-rescale.c
+++ b/drivers/iio/test/iio-test-rescale.c
@@ -652,6 +652,8 @@ static void iio_rescale_test_scale(struct kunit *test)
 	int rel_ppm;
 	int ret;
 
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buff);
+
 	rescale.numerator = t->numerator;
 	rescale.denominator = t->denominator;
 	rescale.offset = t->offset;
@@ -681,6 +683,8 @@ static void iio_rescale_test_offset(struct kunit *test)
 	int values[2];
 	int ret;
 
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buff_off);
+
 	rescale.numerator = t->numerator;
 	rescale.denominator = t->denominator;
 	rescale.offset = t->offset;
-- 
2.34.1